Diaphragm for sound receivers and means for mounting the same



Dec. 29 1925- 1,567,202

L. s'rsmaznszn s mm mamas FOR mdun'rine 'rns sue DIAPHRAGM FOR scum) RECEIVER Filed Jan. 24. 1921 Lou/'5 ifain iv l Patented Dec. 29, 192 5.-

UNITED STATES ATENT OFFICE.

LOUIS STEINBEBGER, 0F BROOKLYN, NEW YORK.

EIAPHRAGMIOR SOUND RECEIVERS AND MEANS FOR MOUNTING THE SAME.

Application filed January 24, 1921. Serial No. 439,410.

To all whom it may concern:

Be it. known that I, Louis STEINBERGER,

a-citizen of the United States, and a resident of the borough of Brooklyn, city and State of New York, have invented certain new and useful Improvements in a'Diaphragm for Sound Receivers and Means for Mount-' ing the Same, of which the following is a specification.

.iy inventionrelates to an improved diaphragm mounting for sound receivers in general, the object 'of the invention beingsound receiver adapted for use with te1e-- phones of a diaphragm constructed and mounted in accordance with my invention.

Fig. 2 is a section of the metalcup to which the diaphragm is secured by a .ring coupling, the partsbeing shown separately.

' In the drawing, 5 designates the exterior casing of a telephone receiver, same being made either of electrose, hard rubber or other suitable non-metallic insulating material, and haying an open end across which the vibratory soft iron diaphragm 6 extends.

A hollow cup-shaped shell 12 of metal having in general the shape of a kettle drum is located within and conforms to the shape of the interior portion of the casing so as to lee-securely seated therein. vThe open end of this shell is closed by the diaphragm 6 which extends across the upper portion of I the cup-shaped shell 12 and is hermetically secured by soldering, welding or other suitable means to the extending flange 13 of said cup-shaped shell whereby an internal chamber l t. is provided between the underside of the diaphragm and the shell. The diaphragm 6 may in the alternative be securely and rigidly clamped tothe flange 13 of-. the shell '12 by means of a-coupling consisting of'a ring-shaped member Pflwhich has a lower flange 21 extending inwardly and engages the underside-of the flange 13. When appear .from the sub- 2 diaphragm -and the shell the diaphragm isthus in place the upper portion of the coupling is then bent around to closely engage the diaphragm as at 22 and thus press the diaphragm dmvnwardly and thereby hold the same tightly against the flange 13 of the metal cup shaped member 12.

By means of the structure as above descr1be'd a sound chamber underneath the ,rhaphragm is formed which is absolutely air tight and thus tends -to increase the volume and sonority of the sound.

With the parts as above described the cap 7 is secured'to the casing!) in the usual way by screwthreaded attachment fas at 8, thus securing the parts in position as shown for use.

described. It is 'deemed suflicient only to say that they may be of any suitable form phragm is caused to vibrate. Care must be taken however toihermetically seal the joint at'fiO wherethe magnetic element 61 passes through the bottom 62 of the shell 12.

As changes of constructioh could be made within the scope of my inventiomfit is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense. Having thus described my invention what I clalm as new and desi ters Patent is:

A sound'receiver having an inner cup like shell with an outer annular flange formed thereon, a diaphragm closing one end'of said shell seated on said flange, and an annular coupling ring having in-turned flanges, the said coupling ringfltting over the edges of the diaphragm and of the annular flange of the shell, the flanges of the couplingrmg directly and closely engaging respectively the diaphragm and the flange of to form an air ti the diaphragm and the she unitary structure.

In witness whereof, I have hereunto set my hand at the borough of Manhattan, city and State of New .York, this "14 day of January, 1921.;

l LOUIS STEINBERGER.

e to secure by Let- 1 thus fprm-ing a .in place- The ma net 'elementsare not particularly v ht j ointbetween as my invention is in no way concerned with thedetalls of the magnet whereby the dia- 

